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Aetiology

Discussing causes, origins, evolution, and implications of disease and other phenomena.

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Tara C. Smith is an Assistant Professor of Epidemiology. Her research involves a number of pathogens at the animal-human nexus. Additionally, she is the founder of Iowa Citizens for Science and also writes for The Panda's Thumb and previously for WIRED SCIENCE's Correlations. Please note the views expressed on this site are Dr. Smith's alone and may not be representative of the groups mentioned above.

"...a veritable expert on tawdry cosmetic procedures gone horribly awry..."--Kevin Beck

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Infectious Disease Series

« Swine flu and deaths in healthy adults--cytokine storm? | Main | Swine influenza--older posts »

Swine flu: 20 US cases now identified [UPDATED--6 Canadian cases also confirmed]

Category: InfluenzaOutbreakPublic healthVarious viruses
Posted on: April 26, 2009 2:05 PM, by Tara C. Smith

According to new information from the CDC, in addition to the 2 cases in Texas, 7 in California, and 2 in Kansas, the 8 in New York have now been confirmed, and an additional case has also been confirmed in Ohio (I've not seen any info on that case)--UPDATED below. Investigations are apparently ongoing in at least 2 Canadian provinces, also (British Columbia and Nova Scotia). An investigation is also ongoing in New Zealand after teenagers took a trip to Mexico and have shown flu-like symptoms.

Concerning to say the least, but crof and revere both have some excellent posts to keep things in perspective. I've hated the screaming headlines at many of the MSM sites, and Crawford has a great post encouraging calm. revere, meanwhile, has a nice overview of influenza and world travel, and what we should be focusing on now that it seems the genie is already out of the bottle.

Again, this is a fast-developing story; some of this information will probably be out of date by a few hours after I post this, so stay tuned...

UPDATED: found some information on the Ohio case, from the Toledo Blade:

The Ohio Department of Health says a 9-year-old boy who recently traveled to Mexico on vacation with his family has a confirmed case of swine flu.

Health department spokesman Robert Jennings said Sunday the boy is recovering at his home in Elyria, in northern Ohio's Lorain County. The child's name was not released.

Jennings says the Centers for Disease Control confirmed the case, but officials do not know if the child has the same deadly strain of swine flu that has killed up to 81 people in Mexico.

Jennings says the boy displayed typical symptoms of the flu, including a sore throat and body aches. Jennings says the child returned from Mexico within the past two weeks.

Jennings says the boy's relatives are being tested for the disease, but they currently do not have any symptoms.

Nova Scotia cases have also been confirmed:

Nova Scotia's chief public health officer says the east coast Canadian province has four confirmed cases of swine flu.

Chief Public Health officer Dr. Robert Strang says Sunday four students from King's-Edgehill School in Nova Scotia ranging in age from 12 to 17 or 18 are recovering. All of them had what he describes as "very mild" cases of the flu.

2 cases in British Columbia also confirmed:

B.C.'s Centre for Disease Control on Sunday confirmed cases of swine flu involving two people from the province who recently returned from Mexico.

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1

Does anyone know where in California the cases of Swine Flu are confirmed?

Posted by: Delores | April 26, 2009 2:00 PM

2

San Diego area. You can find a map of cases here.

Posted by: Tara C. Smith | April 26, 2009 3:26 PM

3

Dr. T: Thanks very much for your prompt response on "MarketBlogic, I don't see how those are in conflict" where I was suggesting that your April 25, 2009 post that "THIRD, is this really a new virus . . . . H1N1 is a common serotype, so additional molecular testing is needed to determine that it's "swine flu" versus "human" H1N1" was in conflict with the CDC.

I gave the shorthand version in part because I'm still a bit dizzy from whatever version of Type A flu I had.

This is an excerpt from the April 23 press conference held by Dr. Anne Schuchat, director of the U.S. Centers for Disease Control and Prevention's National Center for Immunization and Respiratory Diseases:

"According to Schuchat, the virus is influenza A N1H1 mixed with swine influenza viruses. The virus contains genetic pieces from four different flu viruses -- North American swine influenza, North American avian influenza, human influenza viruses and swine influenza viruses found in Asia and Europe, she said.

"That particular genetic combination of swine influenza viruses has not been recognized before in the U.S. or elsewhere," Schuchat said."

http://www.abcnews.go.com/Health/Healthday/story?id=7415611&page=1

Like you said, the information is moving very quickly, the MSM is doing a very poor job of reporting overall and in all honesty the CDC website assumes a very low level of knowledge and so gives out inaccurate information because it's been "dumbed down" to a simplistic level.

To the extent it matters, here's what I think (and much of this is guessing). This strain of Type A H1N1 may have been around at a low level for a while - spreading through human-to-human but slowly. In the U.S., thus far the bug is just a slightly worse than average flu virus, but with fairly extreme GI symptoms not normally seen in the flu. There's absolutely no cause for alarm not to mention hysteria, but I'm mildly peeved that the official CDC position grossly understates the number of cases likely in the U.S. (no one seems interested in testing people in my area, for example, probably because they're overwhelmed), while grossly overstating the seriousness of the threat.

To date, I've not seen any good analysis of why the Mexican fatality rate from this flu in healthy adults appears to be higher than normal while in the U.S. the severity of the flu is pretty typical with past experience (ex the pandemic of 1917, of course).

Posted by: MarketBlogic | April 27, 2009 7:40 AM

4

Tara, thanks for the info. The google maps site reminds me of an NPR report that I heard in November (http://www.npr.org/templates/story/story.php?storyId=96914887) about using Google to get a jump on identifying flu outbreaks. This in turn led me to a New York Times article (http://www.nytimes.com/2008/11/12/technology/internet/12flu.html?_r=1). Is there any evidence that the Google alarm went off early? In the mainstream media, it has sounded to me like this strain had been floating around since March.

HJ

Posted by: Bing | April 27, 2009 10:38 AM

5

is there any cases except sangita bogati and prasanna subedi reported for nepal as swine flu infections??

Posted by: Dilu gandharvha | May 4, 2009 4:47 AM

6

both Prasanna and Sangita reside in crest hill Chicago and has been infected, that is the news so far, no Nepali cases after that.

Posted by: Bipendra Raj Subedi | May 4, 2009 4:51 AM

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